Description Of Major Ics - JVC XV-N30BK[MK2] Service Manual

4.1 74LCX373MTC-X (IC512,IC513) : Octal D-type latch
• Pin layout
OE 1
Q0 2
D0 3
D1 4
Q1 5
Q2 6
D2 7
D3 8
Q3 9
GND 10
(TOP VIEW)
• Pin function
Symbol Description
D0~D7 Data inputs
LE Latch enable input
OE Output enable input
Q0~Q7 3-State latch outputs
SECTION 4

Description of major ICs

20 VCC
19 Q7
18 D7
17 D6
16 Q6
15 Q5
14 D5
13 D4
12 Q4
11 LE
• Truth table
INPUTS
LE OE
X H
H L
H L
L L
H = HIGH Voltage levelL = LOW Voltage levelZ = High imped-
anceX = ImmaterialQ0 = Previous Q0 before HIGH to LOW
transition of latch enable
• Block diagram
D0 D1 D2
3 4 7
D D D
Q Q Q
L L L
11
LE
1
OE
2 5 6
Q0 Q1 Q2
OUTPUT
Dn Qn
X Z
L L
H H
X Q0
D3 D4 D5 D6 D7
8 13 14 17 18
D D D D
Q Q Q Q
L L L L
9 12 15 16
Q3 Q4 Q5 Q6
(No.XA002)1-25
D
Q
L
19
Q7